Yairi GF 350 - additional harmonic bar

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mango

Posts: 158
Joined: Apr. 2 2019

Yairi GF 350 - additional harmonic bar

I have this old 1987 Japanese Flamenca from K.Yairi. Model GF 350. Cedar Top. Some kind of cypress back and sides (laminated?). It is the loudest guitar I ever heard. Well of course the cedar top does its job, but I think this strange "third harmonic bar" could also play a role. What do you think?

Another question: There is a broken back strut. But I have no idea how I could clamp it to repair. Any ideas?

greets, Jonas

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REPORT THIS POST AS INAPPROPRIATE | Date May 18 2020 23:01:44

ernandez R

Posts: 737
Joined: Mar. 25 2019
From: Alaska USA

RE: Yairi GF 350 - additional harmon... (in reply to mango)

Jonas,

Easy peasy. Make a short stick with a saddle of sorts to fit over the split bottom brace and the other end shaped to fit over the corresponding top brace. Length fit so as to be tight enough to force the crack closed as you align the stick mostly vertical. Think of it as a mini go deck stick.

I'm thinking water thin CA would be the easiest but you could preheat the area with heat lamps and what ever, then dab some HHG in there before clamping it up, and wiping off the squeeze out. Slow epoxy would work just as well as would one of the TB products.

But what if the cracked brace was responsible for her increadble volume?!! Ok ok, the pain meds I'm on have me a little loopy ;)

HR

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I prefer my flamenco guitar spicy,
doesn't have to be fast,
should have some meat on the bones,
can be raw or well done,
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REPORT THIS POST AS INAPPROPRIATE | Date May 19 2020 2:57:26

JasonM

Posts: 2054
Joined: Dec. 8 2005
From: Baltimore

RE: Yairi GF 350 - additional harmon... (in reply to ernandez R)

Something like Ernandez is talking about:
https://www.stewmac.com/luthier-tools-and-supplies/types-of-tools/clamps/stewmac-brace-repair-jack.html

REPORT THIS POST AS INAPPROPRIATE | Date May 19 2020 16:14:56

mango

Posts: 158
Joined: Apr. 2 2019

RE: Yairi GF 350 - additional harmon... (in reply to mango)

Ah cool! Yes, very easy actually :-)
Anybody saw a bracing with that "third harmonic bar" before?

REPORT THIS POST AS INAPPROPRIATE | Date May 19 2020 16:25:09

dartemo1

Posts: 76
Joined: Apr. 21 2010

RE: Yairi GF 350 - additional harmon... (in reply to mango)

Yes, please see orfeomagazine.fr/documents/Soundboards_DF.pdf

REPORT THIS POST AS INAPPROPRIATE | Date May 19 2020 17:09:50

Echi

Posts: 1132
Joined: Jan. 11 2013

RE: Yairi GF 350 - additional harmon... (in reply to mango)

That 2nd transverse bar, usually slanted, is commonly attributed to Ignacio Fleta from Barcelona.
The main effect is to stiffen the top and to increase the treble response.
In flamenco guitars is not a common feature but Jesus Bellido and German Barranco are a couple of people using it.

REPORT THIS POST AS INAPPROPRIATE | Date May 20 2020 7:54:19

RobJe

Posts: 731
Joined: Dec. 16 2006
From: UK

RE: Yairi GF 350 - additional harmon... (in reply to Echi)

quote:

In flamenco guitars is not a common feature but Jesus Bellido and German Barranco are a couple of people using it.

Yes but in much lighter form. I found this in 2006 - part an exhibition in Malaga trying to show what a luthier workshop might look like. There were various dusty contributions from Jesus and Manuel Bellido. I have one with this reduced Fleta bracing made by Manuel - the best guitar I have owned.

Rob